High Quality 6 Cells/ 9 Cells Laptop Battery For Lenovo Thinkpad X220 X220i X220s Series 0a36281 42t4861 42t4862 0a36282 0a36283 - Laptop Batteries - AliExpress
X230 New Laptop battery for Lenovo ThinkPad 9 Cell Lithium Ion Battery 44++ 94Wh Extended Life System Battery For X220 And X230|Laptop Batteries| - AliExpress
Amazon.com: Lenovo ThinkPad 9 Cell Lithium Ion Battery 44++ ( Manufacturers P/N; 0A36307 ) 94Wh Extended Life System Battery For X220 And X230 Laptops Only : Electronics
Ten years of ThinkPadding | 127.0.0.1
Best battery life: Laptops that last 7-plus hours
facelessloser on Twitter: "Not surprising but adding a 9 cell battery to my thinkpad x220 made it quite a bit heavier. Hope its better battery life then my old aging battery #ThinkPadX220 #